With 50 days left until Massachusetts voters decide who will represent them in the U.S. Senate for the next six years, Harvard law professor Elizabeth Warren has pulled ahead of Republican U.S. Sen. Scott Brown, according to a new poll.

The survey of Bay State votersconducted Sept. 6-13 by the Western New England University Polling Institute through a partnership with The Republican and MassLive.com, shows Warren leading over Brown, 50 to 44 percent, among likely voters.

The gap among registered voters is even larger, according to the survey, which concluded Warren leads 53 to 41 percent. The poll of 545 registered voters has a 4.2 percent margin of error, while the sample of 444 likely voters has a 4.6 percent margin of error.